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Throttle Body Cleaning

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by The Critic, Dec 31, 2011.

  1. The Critic

    The Critic Resident Critic

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    From the posts that I have read, this is a good service to do periodically because it supposedly gets gummed up more frequently on the Gen II.

    Does anyone have a DIY or some tips/advice they can provide for this service?

    Thanks.
     
    #1 The Critic, Dec 31, 2011
  2. andyprius

    andyprius Senior Member

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    Just do a search on google, there are many posts.
     
    #2 andyprius, Dec 31, 2011
  3. The Critic

    The Critic Resident Critic

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    Found it, thanks:

    TB cleaning

    As I thought, removing the entire air filter housing is the way to go. That would allow me to clean the throttle plate without disturbing the MAF sensor, if I am seeing this correctly.

    My memory of the 2g is starting to become rusty since I have not worked on one in a few months. :p
     
    #3 The Critic, Dec 31, 2011
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  4. The Critic

    The Critic Resident Critic

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    Just did this service on a 08 with 52k last night. There was a light-to-moderate coating of black carbon over the entire throttle body. Used a costco mf rag, some screwdrivers and fingers, and cleaned it all up. Also did the engine air filter and drive belt at the same time.
     
    #4 The Critic, Feb 25, 2012
  5. andyprius

    andyprius Senior Member

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    The physical method works, you can also give it a hit with MAF spray next time. :cheer2:
     
    #5 andyprius, Feb 27, 2012
  6. bisco

    bisco cookie crumbler

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    is this caused by bad gas? my daughters 04 at 90,000 miles shows no signs of performance loss and we have never cleaned it.
     
    #6 bisco, Feb 27, 2012
  7. andyprius

    andyprius Senior Member

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    Re: Throttle Body Cleaningthink

    I think a light carbon or dust coating is normal and operation would be normal. It is good preventitive maintenance tho. Possibly if you drive in a highly industrialized and polluted environement this could be a real problem. Maybe we will hear from China, Mexico in this regard. :cheer2:
     
    #7 andyprius, Feb 27, 2012
  8. SageBrush

    SageBrush Senior Member

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    Some throttle bodies get a lot dirtier than others, to be sure. Seems like many causes might be at play here; I for one have no idea what the common ones are.

    Just check once in a while. It takes all of a few seconds.
     
    #8 SageBrush, Feb 27, 2012
  9. seilerts

    seilerts Battery Curmudgeon

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    It comes from the PCV.
     
    #9 seilerts, Feb 27, 2012
  10. bisco

    bisco cookie crumbler

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    thanks guys, i'll pull off her air filtr and take a peek when it warms up.
     
    #10 bisco, Feb 27, 2012
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